Overspeed,

Remove the board from the case. Push the pins through, then pinch them with your fingers on the back. It will release the push-pin, remove it. Do that 8 times over. The Circu-pipe should just fall off. If it doesn't, grab the NB base of the heatsink (not the loop), and twist - it'll come right off.

Rub the crappy TIM off with a tissue or something similar, then get every bit off with what you usually would. Check the Circu-pipe for any bent heatpipes. The SB and NF200 heapipes were bent up for me. Straighten them out if there's any kinks.

Get some AS Ceramique or some other high performance TIM (not AS5 because it has a curing time), put a blob on each chip (NB, SB, NF200. Leave the PWM if you wish), spread it with a razor or credit card. Place the Circu-pipe back on with the push-pins, or preferably, get some nuts, bolts and washers, then put them 'sinks on real tight.